Patent GB-680639-A (GB)
Title: Improvements in or relating to hydrocarbon oil compositions
IPC: C10L1/18
Filed: 1949-11-15
Abstract: The Specification as open to inspection under Sect. 91 refers to compositions comprising a material characterised by oxidation instability, and a minor proportion of a hydrogenated quinoline. Hydrogenated quinolines specified are 1,2,3,4-tetra-hydroquinoline, 1,2,3,4-tetrahydroquinaldine, decahydroquinoline and decahydroquinaldine.  The quinolines may be substituted by alkyl, cycloparaffinic or aryl groups.  The material characterised by oxidation instability may be synthetic or natural rubber, plastics, greases, waxes or edible fats and oils.  Conventional antioxidants, such as alkyl phenols, polyhydric phenols, amine phenols and diamines may be added to the composition.  This subject-matter does not appear in the Specification as accepted.ALSO:A hydrocarbon oil composition comprises a hydrocarbon oil liable to oxidation instability and minor proportions of one or more oxidation inhibitors of the amine or phenolic type and one or more hydrogenated quinolines.  The oxidation inhibitors used are the alkyl phenols, aminophenols, polyhydric phenols and diamines such as phenylene diamines; particular compounds mentioned are 2, 6-ditertiary-butyl-4-methyl phenol, N-n-butyl-p-amino-phenol and N, N1-di-sec-butyl-p-phenylenediamine. Hydrogenated quinolines specified are 1, 2, 3, 4-tetrahydroquinoline, 1 2, 3, 4-tetrahydroquinaldine, decahydroquinoline and decahydroquinaldine.  The quinolines may be substituted by alkyl, cycloparaffinic or aryl groups.  Hydrocarbon oils referred to are p mineral oils and gasolines; the mixture of oxidation inhibitors and hydrogenated quinolines may also be used to stabilize concentrated lead fluids, for example a mixture of tetraethyl lead and ethylene dibromide in hydrocarbon oil.  Specification 506,565 is referred to. The Specification as open to inspection under Sect. 91, refers to the use of a hydrogenated quinoline without another oxidation inhibitor. Also, it mentions the treatment of greases and waxes. This subject-matter does not appear in the Specification as accepted.ALSO:The Specification as open to inspection under Sect. 91 refers to stabilizing synthetic or natural rubber by incorporating therein a minor proportion of a hydrogenated quinoline. Hydrogenated quinolines specified are 1,2,3,4-tetrahydroquinoline, decahydroquinoline, 1,2,3,4-tetrahydroquinaldine and decahydroquinaldine.  The quinolines may be substituted by alkyl, cycloparaffinic or aryl groups.  Other oxidation inhibitors may also be added to the composition; alkyl phenols, amino phenols, diamines and polyhydric phenols are mentioned.  Particular inhibitors referred to are 2,6-ditertiary-butyl-4-methyl phenol, N-n-butyl-p-aminophenol and N,N1 di-sec.-butyl-p-phenylenediamine.  This subject-matter does not appear in the Specification as accepted.ALSO:The Specification as open to inspection under Sect. 91, refers to stabilizing edible fats and oils by incorporating therein a minor proportion of a hydrogenated quinoline.  Hydrogenated quinolines specified are 1,2,3,4-tetrahydroquinoline, decahydroquinoline, 1,2,3,4-tetrahydroquinaldine and decahydroquinaldine.  The quinolines may be substituted by alkyl, cycloparaffinic or aryl groups.  Other oxidation inhibitors may also be added to the composition; alkyl phenols, amino phenols, diamines and polyhydric phenols are mentioned.  Particular inhibitors referred to are 2,b-ditertiary-butyl-4-methyl phenol, N-n-butyl-p-aminophenol and N,N1-di-secbutyl-p-phenylene-diamine.  This subject-matter does not appear in the Specification as accepted.